Why do you think the north won the war

In the early battles of the Civil War, the South inflicted a lot more casualties on the North while keeping their numbers relatively low. But the North could handle those kinds of losses, they had more people to replace the multiple thousands killed on the battlefield. For the South, time was not on their side.

Explanation:

the completion of the erie canal spurred the first great westward movement of american settlers, gave access to the rich land and resources west of the appalachians and made new york the preeminent commercial city in the united states.

i believe your answer is d)